parameters that are very significant for the evaluation of laser and luminescent materials are calculated based on the quantitative absorption spectra. This approach for calculating JO parameters are particularly important since the proportional relation between absorption and emission intensities are considered. JO intensity parameters (Ω2, Ω4 and Ω6) were calculated for the sample Sr2-xSmxSiO4 (x = 0
通过低温溶液燃烧法制备了用于白色发光二极管(w-LED)的橙红色发光Sr 2 SiO 4:xSm 3+(x = 0.01-0.09)纳米
颜料。就活化剂浓度(Sm 3+)进行了结构和光致发光性质的系统研究。基于定量吸收光谱,计算了对激光和
发光材料评估非常重要的Judd-Ofelt(JO)强度参数。由于考虑了吸收强度和发射强度之间的比例关系,因此这种计算JO参数的方法尤为重要。JO强度参数(Ω 2,Ω 4和Ω对于观察到的发射最大的样品Sr 2-x Sm x SiO 4(x = 0.03)计算出6)。这些参数遵循趋势Ω 2 >Ω 6 >Ω 4。可见发射光谱和JO参数表明,稀土离子周围的结构环境本质上是中心对称的。使用非辐射能量转移机制详细研究了Sm 3+离子掺杂浓度对发光行为的影响。分支比和发射横截面是激光器设计中的关键参数,在我们的案例中为67%和3.82×10 -22 cm 2分别用于过渡4